Bicycle frame



FIG. 1 is the front elevation view of the bicycle frame.

FIG. 2 is the rear elevation view of the bicycle frame.

FIG. 3 is the left side elevation view of the bicycle frame which is a mirror image of the right side view of the bicycle frame.

FIG. 4 is the top plan view of the bicycle frame.

FIG. 5 is the bottom plan view of the bicycle frame. 

The ornamental design for a bicycle frame, as shown and described. 